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New SAE papers published on Voltec design

This week was the SAE World Congress and a number of General Motors engineers, employees, various suppliers, and co-op grad studens delivered papers and presentations on various aspects of the Voltec design.

In fact, the number of papers brought forward by GM this year set an all-time SAE record!

Hey, what sort of motor is is the Volt?
It's been widely reported that the Volt has a three-phase AC induction motor. But the"Voltec 4ET50" paper says the motor is "permanent magnet AC synchronous". That is not the same thing.
This makes a difference because a permanent magnet motor uses rare earths, and an induction motor doesn't.
So which is it?
Anybody have any insight here?

wow ! the more is good .. i will take these one by one .. the most good has been done here is the number of links related upon the various topics helpful in instilling additional knowledge towards any specific parts of an automobile ..